Oscillating stea



(No Model.)

A. B. WGOD.

vOSGILLATING STEAM ENGINE. No. 251,669. 'Patented Deo. 27,1881.

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IUNIeinen .PATENT OFFICE.

AUGUSTUS B. WOOD, OFEFOUNTAIN-HILL, ARKANSAS.

.OSC l L LATI N G 'STEAM -fE`N G IN E.

SPECIFICATION forming' part `of Letters Patent No. 251,669, dated December 27', `1881.

` Application filed May-14, 1881. `(No model.)

To all whom it may concern Be it known that I, A. B. WOOD, a citizen ofthe United States, resident at Fountain Hill, in the county of Ashley and State of Arkansas, have invented certain new and useful Improvements in Oscillating Steam Engines 5 and I do hereby declare the following to be a full, clear, and exact description ot' the invention, such as will enable others skilled in the art to which it appertains to make and use the,

same, reference being had to the accompanying drawings, and to letters or figures ot' reference marked thereon, which form a part of this specification'.

Figure l is a transverse section through the cylinder and chest. Fig. 2 isa longitudinal section of the valveseat and accompanying parts. Fig. 3 is a modification ot' the seat and parts. Figs. 4 and 5 are details. Fig. 6 is a modiication of the valve.

This invention consists in the construction and novel arrangement of parts, as hereinafter set forth.

In the annexed drawings, A is the supporting-frame for the cylinder B, the trunnions b `b of which bear in seats a of the frame.

" C is the piston-head, andD the piston running into the cylinder through stuffing-boxes, and connected to the crank at the other end. At the trunnion side b of the cylinder are the ports, and in-said trunnion there are passages zo ,which lead to the ports, and also an exhaust, This trunnion b passes through a stationary steam-chest, E, provided with packing and glands e e', the former having a recess, e?, into which the exhaust m opens, and from which the pipe F leads to the condenser. Secured upon this trunnion b within chest E is the sector-shaped valve-seat Gr, having the three channels g g g2 leading from its curved edge to its center and communicating with passages a y and exhaust respectively.

H is a stationary valve adjustable by screws h h, held by set-screw h', running from the top of the chest, and provided with the recess h2,

long enough-to span two ofthe channel-open-- ings. This setscrew h passing through the top of the chest has threaded upon itn the nuts h3, between which is the packing. The valve with its stem thus forms a balancevalve. The

mouth'of the port leading to the cylinder being larger than the opening at the top of the chest, the valve is kept down by the pressure.

A screw, '0, may be used to secure the sector to the trunnions, passed up throughan opening, t, in the bottom ofthe chest, serving also to carry olil the water of condensation, and it may beclosed by a drain-cock :attached to the cylinderframe. The chest is made adjustable in the bracket by screws r.

I is the induction-pipe for the steam-chest. The operation of this device is obvious. Steam entering the port passes alternately into channels gg', into the cylinder operating the piston, out through the other channel, into the valve, down the channel g2, and out the exhaust through pipe F, to the condenser,

the cylinder rocking asthe piston travels. This is for a single-acting engine. To reverse I use the construction shown in Figs. 3 and 4.

' The valve L, stationary-as before, has the same recess, h2, but is provided with four openings, ll Z2 L3, twoat each end. These openings are controlled by valves m m, operated by bar M, having the handle N.

. The valve-seat O is providedwith the three channels g g g2., as before; but while g2 occupies its same position, the other two are not all across, but at diagonal corners, and oblique channels o o run from the other corners down through the cut, connecting with the bottom of thechannels g g at the other end oi' the cut from that at which the oblique channels open, so that the said channels g g communicate with both ends of the eut at its curved edge.

In this construction, as the engine is being driven in one direction by steam admitted into the valve-seat on one side, it may be admitted on the other side by operating the valves m, which cuts oft' the steam from the direct channel, causing it to iiow through the oblique to the bottom of the other direct channel, and entering the cylinder from the other end, reversin g the motion.

Instead of the single valve, the double or D valve shown in Fig. 6 may bensed.

I claim- 1. In an oscillating steam-engine, the combination of the cylinder, one of the trnnnions y of which is provided With two eduction-pas- IOO sages and an exhaust, a steam-chest, a valveseat in said chest affixed to said trunnion, and

provided with channels leading to the educ tion-passages and exhaust, and a stationary 5 valve, asset forth.

2. In an oscillating steam-engine, the combination ofthe cylinder, one of the trunnions of which is provided with two eduction-passages and one exhaust, a steam-chest, a valvexo seat in said chest affixed to said trunnion and provided With direct and oblique chan nels leading to theeduction-passages, an exhaust, and a stationary valve having openings governed by slide-valves, whereby the engine can be rer 5 versed, as set forth.

3. VIn an oscillating steam-engine constructed substantially as shown, a steam-chest having an opening at the top smaller than the port leading to the cylinder, in combination with a balanced valve the adjusting-rod of which zo i .in presence of two Witnesses.

AUGUsTUs BALDWiN Woon.

Witnesses:

W. W. Woon, WM. HUGHES. 

